A new understanding of hypersonic inlets'startability criterion

作者：Pan Cheng Jian; Shi Chong Guang; Li Yi Qing; You Yan Cheng^*; Chen Rong Qian

来源：Journal of Propulsion Technology, 2016, 37(11): 2039-2047.

DOI：10.13675/j.cnki.tjjs.2016.11.006

• Internal contraction ratio
• Isentropic
• Isoline
• Kantrowitz
• Total contraction ratio

A series of isolines combining total compression ratio with starting Mach number were acquired by the shock conditions and the continuity equation, based on studies of two-dimensional hypersonic inlet starting mechanism and Kantrowize criterion. These isolines have the following characteristics: The isolines provide a connection between internal compression ratio and total compression ratio. Each isoline has equivalent value of total pressure recovery and mass flow. The isolines can be easily gained by using isentropic criteria equation times the reciprocal of critical starting total pressure recovery of internal duct. The isolines move rightwards because of the incident shock wave and walk leftwards owing to the mass spillage. The isolines provide a mechanism for associating Kantrowitz with isentropic criterion. Conclusively, using these isolines rapidly estimates the inviscid starting Mach number of a two-dimensional mixed-compression multi-wedge hypersonic inlet. The prediction results are in good agreement with the CFD results. The errors are less than 2%, demonstrating the feasibility of this method.

• 出版日期2016
• 单位厦门大学